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Section   I.   SPECIAL   TOOLS   AND   EQUIPMENT
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TM-5-4120-259-15 Air Conditioner Horizontal Compact 9 000 BTU Trane Models Manual
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Evaporator   Fan   Motor   Runs-Condenser   Fan   Motor   and   Compressor   Motor   will   not   Run (Selector Switch on COOL)
TM   5-4120-259-15 30.   Quarterly   Preventive   Maintenance intervals.   A   quarterly   interval   is   equal   to   3 Services calendar   months,   or   250   hours   of   operation, whichever   occurs   first. a.  This   paragraph   contains   an   illustrated b. The   item   numbers   are   listed   consecutive- tabulated   listing   of   preventive   maintenance ly   and   indicate   the   sequence   of   minimum   re- services   which   must   be   performed   by   Organi- quirements.   Refer   to   figure   11   for   the zational   Maintenance   personnel   at   quarterly Quarterly   Preventive   Maintenance   Services. Section   IV.   OPERATOR   MAINTENANCE 31.   General paragraph   29,   the   operator   will   also   perform The  instructions  in  this  section  are  published the   service   procedures   covered   in   the   section. for   the   information   and   guidance   of   the   oper- ator   to   maintain   the   air   conditioner.   In   addition 32.   Cleaning   Air   Filters to   the   maintenance   responsibilities   listed   in Refer   to   figure   12   and   service   the   air   filter. Section   V.   TROUBLESHOOTING 33.   General followed   by   a   list   of   probable   causes   of   the trouble.   The   possible   remedy   recommended   is This   section   provides   information   useful   in described  opposite  the  probable  causee.  Any diagnosing   and   correcting   unsatisfactory   opera- trouble   beyond   the   scope   of   organizational tion   or   failure   of   the   air   conditioner   and   its maintenance   shall   be   reported   to   direct   sup- components.   Each   trouble   symptom   stated   is port   maintenance. 34.  Compressor  Starts  but  Fan  Motor(s)  will  not  Run Probable Cause Possible  Remedy Control   switch   or   motor   defective. Check   fans   to   make   sure   they   turn   freely   by   hand. Check   wiring   and   terminals   for   loose   connections. Check   control   switch   continuity   with   multimeter (fig.  5).  If  switch  is  not  defective  check  motor (para  57  and  58)  and  remove  and  service  if  necessary. 35.  Both  Fan  Motors  Run-Compressor  Motor  will  not  Start  (Selector  Switch  on  COOL) Probable  Cause Possible  Remedy Circuit   breaker   open. Determine   and   correct   cause   of   overload. High   pressure   cut-out   or   compressor   thermal   pro- If   both   fan   motors   operate   but   the   compressor   motor tector  open. does   not   run,   check   the   high   pressure   cut-out. This   cubout   is   a   manual   reset   type.   Check   the   com- pressor   thermal   protector   for   continuity   (fig.   5). If   the   motor   has   cut-out   on   the   above   safety devices,   determine   and   correct   the   cause. Open   circuit. Apply   multimeter   to   compressor   motor   terminals (wiring   Diagram,   fig.   5). 36.   Condenser   Fan   Motor   Runs- Compressor will not Start (Selector Switch on COOL) Probable Cause Possible  Ramedy Circuit   breaker   open. Determine   and   correct   cawe   of   overload. Thermal   delay   switch   defective. Repair   or   replace   (para   63). 14

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